countryside England english exercise footpath Great Britain nature path peaceful rural shade slope spring steps Sussex track trail travel trees walk woodland direction footbridge forest landscape natural chalk downland hike hills South Downs summer Trek view bare beginning branches fence field outdoors start winter arch autumn color colour dappled fall garden lime linden London park pergola shadow sunlight Tilia tree alone calm crop Downs farm grain lone peace quiet serene south tranquil verge bark conifers cool deciduous evergreen green light refreshing Surrey trunk leaves November shadows bridleway dirt road environment fields distance long national park sky disused estuary line Mawddach railway river wales water welsh